RV Investigator Voyage IN2021_T01 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2021_T01, Brisbane to Darwin Transit which departed Brisbane (QLD) on the 11 Jun and returned to Darwin (NT) on the 22 Jun 2021.

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information along the transit generally in depths shoal of 1000m.

The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz.

Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 271 files totalling 58.5 GB of raw data in this dataset.

Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.

EGM2008 geoid seperation model was applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format.

Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

本记录描述了“探索者号”（RV Investigator）科考船IN2021_T01航次所采集的多波束测深仪（multibeam echosounder）数据，该航次为布里斯班至达尔文过境航行，于2021年6月11日从昆士兰州（QLD）布里斯班启航，同年6月22日返回北领地（NT）达尔文港。

本航次使用康士伯EM710 MKII多波束测深仪采集沿该过境航线的海底地形测深与后向散射数据，作业水深普遍浅于1000米。

EM710 MKII的发射与接收角分辨率分别为0.5°×1°，该测深仪的标称频率范围为40至100 kHz。

本数据集的水深地形与后向散射原始数据以*.all格式存储，水柱后向散射数据以*.wcd格式存储，均留存于澳大利亚联邦科学与工业研究组织（CSIRO）。本数据集共包含271个文件，总原始数据量达58.5 GB。

数据采集阶段已对该数据应用声速剖面校正；*.all格式存储的水深地形数据已完成运动与位置校正。

本处理后数据已应用EGM2008大地水准面差值模型，且已剔除异常值。处理后的航线数据以*.gsf格式与ASCII格式提供，处理后的水深地形与后向散射格网数据以GeoTIFF格式提供。

本数据集的更多信息（包括处理流程的详细说明）收录于GSM数据采集与处理报告中。额外数据产品可根据申请获取。